Jewel carries ouchless hair bands around the house and meows. She drops them for me as presents, but when I pick them up she looks at me as if I've shot the pope until I put them back down. She'll take the hair band and hide it under the scale in my bathroom.
Casper thinks he's got the slight of paw thing down pat. He'll jump up when people are eating and try to lay down next to them. When they turn to look at him or try to move him, he'll swipe a paw out lightening quick and try to grab a piece of food.
Tink will only eat one brand of food in two flavors. The odd thing is that it has to be from a 5.5 ounce can. If I try to give her the same food in the same flavor from a large can she'll turn her nose up and meow like I haven't fed her for a week. She won't touch the stuff. I thought it was a fluke at first, but I've tested it several times and her reaction is always the same.
Frank paces and stares while I'm on the toilet. He'll continue doing it until I pick him up. Any other time he'll jump in my lap without help.
Henry breaks into cabinets and can get into most any container to get to catnip. He spills it all over the kitchen floor and rolls in it. When I get out the catnip and offer it he acts indifferent most of the time.
Thomas routinely stalks invisible things on the walls. He'll just randomly jump about half way up the wall trying to get *whatever*.
That's just one quirk for each cat. I could probably fill a couple of pages if I kept going.